Back to EveryPatent.com
United States Patent | 5,572,897 |
Aleksandrovich ,   et al. | November 12, 1996 |
Method of obtaining hollow forgings by radial forging of solid blanks where generating AA of the surface of solid blank (1) or its edge is oriented longitudinal axis CC of the working surface of forging tool (3) and blank 1 is swaged in a radial direction by at least one pair of forging tools (3) first in one direction with its subsequent rotation around longitudinal axis OO and/or is moved along axis OO, is swaged in another radial direction at defromation rates approximately within 3-8% of the current cross-sectional dimensions of blank (1) with the result that the width of the contact area element is approximately within 0.121-0.124 of said current cross-sectional dimension of blank (1).
Inventors: | Aleksandrovich; Tjurin V. (Trofimov Str. 9/117, 112321 Moscow, RU); Ivanovich; Kuroles V. (Planernaya Str. 12/1/255, 123481 Moscow, RU); Andreyevich; Lazorkin V. (Zadneprovskaya Str. 16a/100, 330096 Zaporozhye, UA); Mikhaylovich; Volodin A. (Engels Str. 41/8/18, 390010 Kurgan Ryazan, RU) |
Appl. No.: | 244925 |
Filed: | June 16, 1994 |
PCT Filed: | June 2, 1993 |
PCT NO: | PCT/RU93/00124 |
371 Date: | June 16, 1994 |
102(e) Date: | June 16, 1994 |
PCT PUB.NO.: | WO93/24256 |
PCT PUB. Date: | December 9, 1993 |
Jun 04, 1992[RU] | 5045887/27 |
Current U.S. Class: | 72/368; 72/377 |
Intern'l Class: | B21K 021/00 |
Field of Search: | 72/368,374,375,376,377 29/526.5,527.5 |
3495428 | Feb., 1970 | Marcovitch | 72/91. |
Foreign Patent Documents | |||
309745 | Dec., 1989 | JP | 72/376. |
591261 | Feb., 1978 | SU | 72/377. |
668750 | Jun., 1979 | SU | 72/377. |
715195 | Feb., 1980 | SU. | |
1634355 | Mar., 1991 | SU. |
Andritz AG, "Hydraulische Schmiedemaschine Type SMA," Graz-Andritz, Austria. A017101 2000d-84. GFM, "Precision Forging Machines," Austria, Copyright 76-09-08/2. GFM, "CNC-Precision Forging Machines," Austria, Copyright 1987-03-16. Hojas, H., "Long and Continuous Forging Machines--Development and Field of Application," Metals Technology, Dec. 1979, pp. 449-455. Dzugutov, M. Ya., Metallurgiya, Moscow, 1974, pp. 165-171. |